package com.itheima.reggie.config;

import com.itheima.reggie.JacksonObjectMapper;
import com.itheima.reggie.interceptro.LonginCheckInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.ArrayList;
import java.util.List;

@Configuration
public class ReggieWebMvcConfig implements WebMvcConfigurer {

    @Autowired
    private LonginCheckInterceptor longinCheckInterceptor;
    //设置静态资源映射
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {

        //当访问请求是/backend/**时,去classpath:/backend/寻找对应资源
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        List<String> list = new ArrayList<>();
        list.add("/backend/**");//静态资源
        list.add("/error"); //错误信息
        list.add("/employee/login"); //登陆
        list.add("/employee/logout");   //退出

        //配置拦截路径
        registry.addInterceptor(longinCheckInterceptor)
                .addPathPatterns("/**")//拦截所有
                .excludePathPatterns(list); //忽略的路径
    }


    //扩展mvc框架的消息转换器
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将Java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0, messageConverter);
    }


}
